MESON Chess Problem Database

Problem Display
PID: 182585 (1q6/8/2n2pn1/2P1kB2/b3P3/rNR3K1/1Q3P2/b5B1 w - - 0 1)

Preiswerk, Walther Edouard

National-Zeitung Basel, 1921

1q6/8/2n2pn1/2P1kB2/b3P3/rNR3K1/1Q3P2/b5B1

#2

9 + 8

16108 Walther Preiswerks Shachprobleme (M. Henneberger) 1949

SOLUTION

  • SOUND
  • Sets
    • 1...Sh4
      • 2.f4#
    • 1...Se7
      • 2.f4#
    • 1...Sf8
      • 2.f4#
    • 1...Sh8
      • 2.f4#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sf3#
      • 1...Kd4+
        • 2.f4#
      • 1...Sd4
        • 2.Sc4#
        • 2.Qxb8#
      • 1...Sh4
        • 2.f4#
      • 1...Bd1!
    • 1.Rd3+?
      • 1...Bxb2
        • 2.Rd5#
      • 1...Sd4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sf3#
      • 1...Kxd4+
        • 2.f4#
      • 1...Sxd4
        • 2.Qxb8#
      • 1...Bd1
        • 2.Sxc6#
      • 1...Sh4
        • 2.f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(g);N_GUARD::P(C)
  • Tries
    • Try
      • S(D);P_SPINR(E)
      • Threat
        • S(D)
      • Vars
        • K(d);CHECK,S_FLIGHT::B(A)+P(C)
        • S(g);N_GUARD::P(C)
      • Refutation
        • B(c);
    • Try
      • R(E);CHECK
      • Vars
        • B(a);XQ(B)::R1(E)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • S(D);P_SPINR(E)
    • Threat
      • S(D)
    • Vars
      • K(d);CHECK,S_FLIGHT,XS(D)::B(A)+P(C)
      • S(e);N_GUARD,SBLOCK,XS(D)::QAB(B),XQ(h)
      • B(c);N_GUARD::S(D),XS(e)
      • S(g);N_GUARD::P(C)
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